1 /* Error handler for noninteractive utilities
2 Copyright (C) 1990-2000 Free Software Foundation, Inc.
4 This file is part of the GNU C Library. Its master source is NOT part of
5 the C library, however. The master source lives in /gd/gnu/lib.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public License as
9 published by the Free Software Foundation; either version 2 of the
10 License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
17 You should have received a copy of the GNU Library General Public
18 License along with the GNU C Library; see the file COPYING.LIB. If not,
19 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
30 #if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC
33 # define VA_START(args, lastarg) va_start(args, lastarg)
36 # define VA_START(args, lastarg) va_start(args)
39 # define va_alist a1, a2, a3, a4, a5, a6, a7, a8
40 # define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
43 #if STDC_HEADERS || _LIBC
52 #ifndef HAVE_DECL_STRERROR_R
53 "this configure-time declaration test was not run"
55 #if !HAVE_DECL_STRERROR_R
60 # define _(String) String
63 /* If NULL, error will flush stdout, then print on stderr the program
64 name, a colon and a space. Otherwise, error will call this
65 function without parameters instead. */
66 void (*error_print_progname) (
72 /* This variable is incremented each time `error' is called. */
73 unsigned int error_message_count;
76 /* In the GNU C library, there is a predefined variable for this. */
78 # define program_name program_invocation_name
81 /* In GNU libc we want do not want to use the common name `error' directly.
82 Instead make it a weak alias. */
83 # define error __error
84 # define error_at_line __error_at_line
88 /* The calling program should define program_name and set it to the
89 name of the executing program. */
90 extern char *program_name;
92 # ifdef HAVE_STRERROR_R
93 # define __strerror_r strerror_r
96 # ifndef strerror /* On some systems, strerror is a macro */
101 private_strerror (errnum)
104 extern char *sys_errlist[];
107 if (errnum > 0 && errnum <= sys_nerr)
108 return _(sys_errlist[errnum]);
109 return _("Unknown system error");
111 # define strerror private_strerror
112 # endif /* HAVE_STRERROR */
113 # endif /* HAVE_STRERROR_R */
114 #endif /* not _LIBC */
116 /* Print the program name and error message MESSAGE, which is a printf-style
117 format string with optional args.
118 If ERRNUM is nonzero, print its corresponding system error message.
119 Exit with status STATUS if it is nonzero. */
123 #if defined VA_START && __STDC__
124 error (int status, int errnum, const char *message, ...)
126 error (status, errnum, message, va_alist)
137 if (error_print_progname)
138 (*error_print_progname) ();
142 fprintf (stderr, "%s: ", program_name);
146 VA_START (args, message);
147 # if HAVE_VPRINTF || _LIBC
148 vfprintf (stderr, message, args);
150 _doprnt (message, args, stderr);
154 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
157 ++error_message_count;
160 #if defined HAVE_STRERROR_R || _LIBC
162 # if HAVE_WORKING_STRERROR_R || _LIBC
163 fprintf (stderr, ": %s", __strerror_r (errnum, errbuf, sizeof errbuf));
165 /* Don't use __strerror_r's return value because on some systems
166 (at least DEC UNIX 4.0[A-D]) strerror_r returns `int'. */
167 __strerror_r (errnum, errbuf, sizeof errbuf);
168 fprintf (stderr, ": %s", errbuf);
171 fprintf (stderr, ": %s", strerror (errnum));
180 /* Sometimes we want to have at most one error per line. This
181 variable controls whether this mode is selected or not. */
182 int error_one_per_line;
185 #if defined VA_START && __STDC__
186 error_at_line (int status, int errnum, const char *file_name,
187 unsigned int line_number, const char *message, ...)
189 error_at_line (status, errnum, file_name, line_number, message, va_alist)
192 const char *file_name;
193 unsigned int line_number;
202 if (error_one_per_line)
204 static const char *old_file_name;
205 static unsigned int old_line_number;
207 if (old_line_number == line_number &&
208 (file_name == old_file_name || !strcmp (old_file_name, file_name)))
209 /* Simply return and print nothing. */
212 old_file_name = file_name;
213 old_line_number = line_number;
216 if (error_print_progname)
217 (*error_print_progname) ();
221 fprintf (stderr, "%s:", program_name);
224 if (file_name != NULL)
225 fprintf (stderr, "%s:%d: ", file_name, line_number);
228 VA_START (args, message);
229 # if HAVE_VPRINTF || _LIBC
230 vfprintf (stderr, message, args);
232 _doprnt (message, args, stderr);
236 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
239 ++error_message_count;
242 #if defined HAVE_STRERROR_R || _LIBC
244 # if HAVE_WORKING_STRERROR_R || _LIBC
245 fprintf (stderr, ": %s", __strerror_r (errnum, errbuf, sizeof errbuf));
247 /* Don't use __strerror_r's return value because on some systems
248 (at least DEC UNIX 4.0[A-D]) strerror_r returns `int'. */
249 __strerror_r (errnum, errbuf, sizeof errbuf);
250 fprintf (stderr, ": %s", errbuf);
253 fprintf (stderr, ": %s", strerror (errnum));
263 /* Make the weak alias. */
265 # undef error_at_line
266 weak_alias (__error, error)
267 weak_alias (__error_at_line, error_at_line)